11787531924 has 144 divisors (see below), whose sum is σ = 33653587968. Its totient is φ = 3195605952.

The previous prime is 11787531911. The next prime is 11787531983. The reversal of 11787531924 is 42913578711.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1714117 + ... + 1720979.

It is an arithmetic number, because the mean of its divisors is an integer number (233705472).

Almost surely, 2^11787531924 is an apocalyptic number.

11787531924 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11787531924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16826793984).

11787531924 is an abundant number, since it is smaller than the sum of its proper divisors (21866056044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11787531924 is a wasteful number, since it uses less digits than its factorization.

11787531924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7034 (or 7025 counting only the distinct ones).

The product of its digits is 423360, while the sum is 48.

The spelling of 11787531924 in words is "eleven billion, seven hundred eighty-seven million, five hundred thirty-one thousand, nine hundred twenty-four".